使用Java在Tomcat 9中创建文件时出错

我有一个以前在Tomcat8中运行的Java程序。

private static int logWriter(String data) {

         Calendar now = Calendar.getInstance();
         int year_file = now.get(Calendar.YEAR);
         int month_file= (now.get(Calendar.MONTH) + 1);
         int date_file = now.get(Calendar.DATE);

        String filename = "LogAdaptive"+year_file+month_file+date_file;

        File logFile = new File("/var/logs/tomcat9/"+filename+".txt");

        boolean blnExists = logFile.exists();
      FileWriter fw = null;
      FileWriter fstream = null;
      BufferedWriter bw = null;
      BufferedWriter fbw = null;

        try {
            if (!blnExists) // if not exist, create file
            {
                fw = new FileWriter(logFile.getAbsoluteFile());
                bw = new BufferedWriter(fw);
                bw.write(data);
                String newLine = System.getProperty("line.separator");
                bw.write(newLine);
                bw.close();
                fw.close();
            } else // if exist, amend file
            {
                fstream = new FileWriter(logFile, true);
                fbw = new BufferedWriter(fstream);
                fbw.write(data);
                fbw.newLine();
                fbw.close();
                fstream.close();
            }
        } catch (Exception e) {
            logWriter(EXCEPTION_STR0 + e);
        } finally {
            try {
                if (fw != null){
                    fw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (fstream != null){
                    fstream.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (bw != null){
                    bw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (fbw != null){
                    fbw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }
        }
        return 1;
   } // end logWriter function

现在，我已经将我的Tomcat升级到了Tomcat 9，并且我发现程序在

getAbsoluteFile

上给了我错误

我怀疑这个错误是因为文件夹的访问权限受到限制

但是，我已经将权限更改为chown root，chmod 777，但它仍然给出相同的错误-

open（FileOutputStream.java:270）Jun 1 16:48:29 T tomcat9[7844]：#011at FileOutputStream.（FileOutputStream.java:213）6月1日 16:48:29 T tomcat9[7844]：#011at FileOutputStream.（FileOutputStream.java:162）6月1日 16:48:29 T tomcat9[7844]：#011at java.io.FileWriter.（FileWriter.java:90）Jun 1 16:48:29 te tomcat9[7844]：#011at auap.AdaptiveAuthService.logWriter（AdaptiveAuthService.java:1134）Jun 1 16:48:29 T tomcat9[7844]：#011at 日志编写器（AdaptiveAuthService.java:1151）

同一段代码在Tomcat8中运行良好，但在Tomcat9中却不行

Tomcat 9的安全增强是否有任何限制导致我的代码无法运行

上面是我用来在Tomcat8和Tomcat9中创建文件的代码。

private static int logWriter(String data) {

         Calendar now = Calendar.getInstance();
         int year_file = now.get(Calendar.YEAR);
         int month_file= (now.get(Calendar.MONTH) + 1);
         int date_file = now.get(Calendar.DATE);

        String filename = "LogAdaptive"+year_file+month_file+date_file;

        File logFile = new File("/var/logs/tomcat9/"+filename+".txt");

        boolean blnExists = logFile.exists();
      FileWriter fw = null;
      FileWriter fstream = null;
      BufferedWriter bw = null;
      BufferedWriter fbw = null;

        try {
            if (!blnExists) // if not exist, create file
            {
                fw = new FileWriter(logFile.getAbsoluteFile());
                bw = new BufferedWriter(fw);
                bw.write(data);
                String newLine = System.getProperty("line.separator");
                bw.write(newLine);
                bw.close();
                fw.close();
            } else // if exist, amend file
            {
                fstream = new FileWriter(logFile, true);
                fbw = new BufferedWriter(fstream);
                fbw.write(data);
                fbw.newLine();
                fbw.close();
                fstream.close();
            }
        } catch (Exception e) {
            logWriter(EXCEPTION_STR0 + e);
        } finally {
            try {
                if (fw != null){
                    fw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (fstream != null){
                    fstream.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (bw != null){
                    bw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }

            try {
                if (fbw != null){
                    fbw.close();
                }
            } catch (IOException e) {
                logWriter(EXCEPTION_IO + e);
            }
        }
        return 1;
   } // end logWriter function

---

我怀疑您会授予777对目录的访问权，但不会授予其子目录的访问权。使用

chmod-R 777

访问目录、子目录和目录中的文件

但是，通常我们不提供777访问权限。我们启动我们的应用程序过程，在您的情况下，它是tomcat启动脚本或服务，具有对所有依赖目录具有适当权限的适当用户

---

如果您使用“root”用户或任何具有访问从属目录适当权限的用户启动应用程序，您的问题将得到解决。

什么是异常消息？文件输出流